Walking aid



FIG. 1 is a perspective view of a walking aid of the new design;

FIG. 2 is a front elevational view of the walking aid of FIG. 1;

FIG. 3 is a rear elevational view of the walking aid of FIG. 1;

FIG. 4 is a right side elevational view of the walking aid of FIG. 1;

FIG. 5 is a left side elevational view of the walking aid of FIG. 1; and,

FIG. 6 is a top plan view of the walking aid of FIG. 1.

The portions of the Figures shown in broken lines are not part of the claimed design and are for illustration only. 

CLAIM The ornamental design for a walking aid, as shown and described. 